Japan is planning to boost the number of intelligence gathering satellites in operation from the current four to eight by fiscal 2023.
By 20nana75 (squared by Juan Pablo Arancibia Medina) [GFDL or CC-BY-SA-3.0], via Wikimedia Commons
At the moment, Japan has three optical spy satellites in orbit and a same number of synthetic aperture radar satellites. Four are operational, one is on standby while the last one has exceeded its operational lifespan.
[thumb]http://www.yomiuri.co.jp/science/20150909-OYT1T50004.html[/thumb]